Centrifugal separator or clarifier



Feb. 27, 1945. A. F. HowE v CENTRIFUGAL SEPARATOR OR CLARIFIER 5Sheets-Sheet l Filed Sept. 19, 1940 Peb. 27, 1945. A. F HOWE 2,370,353

CENTRIFUGAL SEPARATOR OR GLARIFIER Filed Sept. 19, 1940 5 Sheets-Sheet 2f a a ef IM- lll -'llM 3f ry i v a f2 l 17 i K? if )y Feb. 27, 1945. A FHOWE '2,370,353

CENTRIFUGAL SEPARATOR OR CLARIFIER Filed Sept. 19, 1940 5 Sheets-Sheet 3Feb- 27, 1945 l A. F. HowE 2,370,353

V CENTRIFUGAL SEPARATOR 0R CLARIFIER Filed Sept. 19,v 1940 5Sheets-Sheet 4 A. F. HOWE kCEINTRIFUGAL SEPARATOR OR CLARIFIER Feb. 27,1945.

Filed Sept. 19, 1940 5 Sheets-Sheet 5 rerenred Fei. 27, i945 cENTmFUGALsEPAnA'roa. on erhmmm Andrew F. Howe, University City, Mo. Applicationseptember 19, 1940, serial No. 357,348

(c1. 21o-o9) 2 Claims.

This invention has reference toa centrifugal separator or clarifier; andrelates particulariy to mechanisms for use in detaching solids and thelike from fluids in which they are sustained or immersed, and therebypartially drying the solids.

Objects of the invention are to provide a machine comprisingdifferentially rotating parts arranged to receive in a space betweenthem the `materials to be separated or clarified, and for effectingeither a continuous or an intermittent now and discharge of theseparated and partially dried solids from one end of said space and thefluid from the other end of said space; to provide an improved andhighly eflicient mechanism for continuously rotating said parts; toarrange said parts at appropriate angles of inclination from ahorizontal plane to control the movement of the solids toward thedischarge outlet therefor at one end of said space; to 'provide meansfor regulating and controlling the movement of the solids toward thedischarge outlet therefor; to provide means for' controlling andregulating the velocity of centrifugal movement or'ilow of the solidsinto said space in order to prevent damage to or cutting of any of theparts by the solids contacting therewith; to provide improved valvemeans for openingk and closing the space to effect intermittentdischarge of the solids therefrom; to provide centrifugalr actuators forsaid valve means for moving the same to closed position to preventdischarge of the solids from said space; to provide mechanism forintermittently opening said valve means to permit intermittent dischargeof the solids from said space automatically and as an incident tooperation of the machine; and

an automatic oil lter device embodied in thel machine shown in Fig. 1. l

Fig. 3 is an enlarged sectional view of the upper portion of the machineshownein Fig. l.

Fig. 4 is a horizontal sectional view on the line 4-4 of Fig. 3, showingthe means for controlling and regulating or retardingthe centrifugalfeed of sand and other heavy materials into the m9.- chin for processingoperations.

Fig. 5 is a perspective view showing the parts of the screen bowl inseparated relationship before being attached together.

Fig. 6 is a sectional Viet?7 on the line 6-6 of Fig. 3. o

Fig. 'l is a vertical sectional view of a solid bowl machine having avalve and centrifugal mechanism for closing the same.

Fig. 8 is an enlarged sectional view of the upper portion of the machineshown in Fig. 7,

' showing one form of mechanism for controlling the centrifugal devicesprovided to close the bottom valve.

' Fig. 9 is a similar sectional view showing another form of saidcentrifugal devices.

Fig. 10 is a sectional view of a machine having two valves foralternately controlling discharge of solids from the solid bowl machineshown in Figs. l and 8.

The machine shown in Figs. l to 6, inclusive, is oflthe continuous flowtype and comprises a tubular shaft I supported in bearings 2 and 3 forrotation about a vertical axis. A pulley 4 attached to the lower end ofthe shaft I is engaged by belts 5 driven by a pulley 8 constantlyrotated by a motor l. I have found that this type of driving mechanismfor a continuous centrifugal 4 drier is greatly superior to positivegear driving tially conical canopy 9. This frame 8-9 may be rigidlysupported in a rigid frame structure I0.

The upper end of the shaft I is formed withan f An annular disc I2 isintegral radial flange II. seated on the flange il and formed with anintegral downwardly and outwardly inclined fluted peripheral portion I!surrounding the upper end of the canopy. 9 and functioning as a guard to.4 prevent foreign substances from passing into the of parts. Theconical portion II 'of the bottom: plate has a series of integral radialand circumferentially spaced armsor spokes I1 formed integral or rigidat their outer ends with a ring Il. The spaces between the arms orspokes I1 constitute passages for the solids or solid materialdischarged fromthe centrifugal mechanism in a substantially dry statebecause of the fact that a very large proportion of water and otherliquid is separated from the solids by operation of the machine.

A conical screen basket Il having therethrough a large number ofelongated slots 20 extending generally in a circumferential directionhas a radial supporting flange 2I seated upon the ring Il and rigidlyattached thereto by an annular series of removable and replaceable boltsor fasteners 22. The cone I constitutes a part of the screen basket andsupports the remaining elements of said basket. A conical woven wirescreen 23 (Fig. 5) is attached to the inner side of the cone I9; arelatively thin perforated plate 24 covers the entire inner surface' ofthe woven screen 23, the holes 25 through said plate 24 beingperpendicular or normal to the surfaces of said screen and, therefore,inclined outwardly and upwardly relative to the vertical axis of thecone and of the shaft I. A relatively thin combined screen element ,andguard plate 25 is seated against the inner surface of the plate 24, and

is formed with numerous horizontally elongated slots 21 through whichwater and other fluids may pass to the screen plate 24. Thesmallinclined holes 25 permit the water and other fluids to passtherethrough; but, since the walls of -said holes are inclined,centrifugally impelled solids are stopped by said plate 24 and do notpass in any substantial amounts through the holes 25. Some of thecentrifugally impelled solids become lodged and retained temporarilywithin the slots 21 in the combined screen and guard plate 26. Becauseof the fact that the basket cone I5 is `rigidly attached to the rotarytubular shaft I,

the entire lscreen basket comprising the cone I9. the screen 23, theplate 24, and the screen and 24 and 23 are rigidly attached to the upperend of the screen basket I8 by a clamp ring 28 and screws 2 9 (Fig. 3).

A rigid housing wall 3| forms a space 3| around the centrifugal screencone and supports an inlet hopper 32 which extends downwardly into andthrough an opening in the upper end of the screen basket I9. The mixedliquids and solids are delivered into themachine through said inlethopper either intermittently or continuously according to the nature'ofthe materials and the purposes for which the machine 'is used.

A shaft 33 is mounted concentrically within the shaft I forrotationwithin bearings 34 and 35 mounted in said shaft I and permitting theshafts I and u to be rotated differentially. AA gear li attached to thelower end of the shaft l meshes with ,a gear 3.1 attached to a shaft 38Ajournalled for rotation in bearings 3l about an' axis parallel with theaxis of the shafts "I and 33. LA gear 4I attached to the shaft 3l belowthe gear 31 meshes withla gear 4I attached to the shaft 33 below thegear tl. The dimensions of these gears Il, 31, and 4I are such as torotate the shaft 33 'at any desired differential.. speed-either sloweror fasteras compared with thespeed ofro'tationof the shaft .I. In somealthough this differential may be varied as desired.

A rigid leak-proof housing 42 enclos'es the differential gearing andalso supports a bearing 43 for the extended end of the shaft 33 belowthe bearing 34. An oil container 44 is rigidly supported adjacent to thehousing 42 and discharges oil through a tube 45 into the lower end ofsaid housing to lubricate the gearing confined therein and the bearings34 and 43. An oil rpump 46 of known construction and operation isattached to the lower end of the shaft 35 and forces oil through a tube41. opening into .the cylindrical portion 8 above the bearing s. The oilpassing from the tube 41 lubricates the bearing 3 and passes downwardlytherefrom to lubricate the bearing 2, and thence passes through a tube48 into the container 44 and into a fllter 49 in said container. Thus,the used oil is ill tered before passing from the container 44 back intothe housing 42 through the tube 45. The cap 50 of the container 44 isremovable and re. placeable in order to permit the filter 49 to beremoved and replaced or cleaned as desired.

An inner trunco-conical member comprising a lower cone member 5I and anupper continuing cone member 52 is rigidly attached to and rotated bythe upper end of the shaft 33 within the screen basket and separatedfrom said basket by a conical space 53. A spiral series of flights 54 isattached to the inner cone within the space 53 and said flights are, insome instances, provided with elastic outer edges or rubbing surfaces 55which rub or operate against the combined screen element and guard plate26 because said flights are rotated differentially with respect to thescreen basket. This differential movement of the flights rubbing againstthe plate 26 moves and stirs the solids temporarily lodged and retainedwithin the slots 21, and causes said solids to movedownwardly throughthe space 53 to ultimate discharge through the spaces between.

the spokes I1. In some instances, a conical or dome-shaped plate 58 isattached to the upper end of the inner cone (Fig. l); or, if desired, aflat plate 51 (Fig. 3) may be attached to the upper end of said cone.Curved retarder flanges 5l (Fig. 4) are formed integral or rigid withthe upper surface of the plate 56 or the plate 51, as the case may be,the outer ends of said flanges curving to form pockets 59 in the forwardsides thereof to retard and delay speed of centrifugal movement of thematerials discharged onto said plates through the inlet 32. The pockets59 are formed by .continuous rearward and forward curvature of theflanges 58. The materials are discharged slowly and' without greatcentrifugal force from the pockets 59 into the space 53. By centrifugal-and conduct them to a suitable point of delivery and' prevent them frompassing downwardly to thesolids discharged from the lower end of thespace`53.

The solids pass from the lower end of the space 53 betweenv the spokesI1.onto a rotary conical instancesjl.' have found it desirable toprovide a. differential of approximately 1000 revolutions of the/shaft 1990 revolutions ofthe shaft.

floor tI. iThe conical floor 6I is supported on rollers 42 and .has itsupper portion extending `inwardly toward the stationary conical frame Iin order to rccciveand conduct downwardly the solids passing from thespace 53. An annular rack I8 is attached to the inner side of theconical door Si and is engaged by a constantly rotating gear 88 attachedto the upper end of a shaft l5. The shaft 95 is driven by anyappropriate mecha.- nism, and is preferablycoordinated with the motor sothat the floor BI will be rotated concurrently with the operation of thecentrifugal mechanism.

The solids are discharged from a rotary conical conveyor or :door 6Bonto the bottom 66 of a reor flights 68 also tend to separate the solidparticles or pieces and prevent cohesion thereof.

The forms of the invention shown in Figs. 7, 8,

9 and l0 are embodied in a continuous centrifugal self-cleaningseparator and clarifier of the solid bowl type. One form of solid bowlmachine is disclosed in my companion application Serial No. 129,14, ledMarch- 5, 1937, patented October 22, 1940, No. 2,218,532. Said machinecomprises a rotary solid bowl 59 rigidly attached by fasteners l@ to asupport li. The bowl 59 is above the support il, and said support hasnumerous passages l2 therethrough for the downward discharge of solidsfrom the bowl 69. The support li is rigidly and detachably secured toand supported by a iiange i3 formed on the upper end of a tubular shaft'id analogous to the shaft i, already described. The shaft 'id issupported in bearings it and l@ for rotation about a vertical axis. Apulley il attached to the lower end o the shaft 'F45 is engaged by abelt or belts 'it operated by a pulley 'i9 constantly rotated by a motordt. This driving mechanism for the shaft ld is like that alreadydescribed for driving the shaft i and possesses the same advantages. Thebear ings le and it are mounted in a rigid stationary frame including acylindrical portion di enclosing and supporting the bearings i5 .and itand formed integral or rigid with a substantially conical i'ranieportion t2. This frame is rigidly mounted in a frame structure t3. Bythis mechanism the shaft llt and the solid bowl 59 will be constantlyrotated when the motor d@ is running.

A shaft d@ is mounted eonoentrically within 'the shaft id for rotationin bearings t5 and tt whichy permit said shafts to be rotateddifferentially. A gear di attached to the lower end of the shaft ltmeshes with a gear ed rigid on a shaft d@ lournalled for rotation inbearings 9@ about'an axis l parallel with the axis of the shafts H13 andtd. A gear si attached to the shaft @t below the gear @d engages agears? secured to the shaft @d below the gear The relative dimensions ofthese gears are such as to rotate the shaft iid at any desireddierential speed with respect to the speed oi rotation of the shaitlt.The dierential of rotation as between these shafts may be varied asdesired. A rigid housing et enoloses the diiferential gearing andsupports a bearing 9d for the extended lower end oi the shaft ed.

A'wall 95 is attached to the extended upper end of the shaft tt beyondthe upper end of the shaft ld and within the solid bowl 39. A tube @trigid with the wall 9E constitutes a passage lthrough which the mixedsolids and liquids are conducted into the centrifugal mechanism forseparation. A number of openings @l in thel lower end of the tube 96permits the solids and liquids to ow or to be forced by centrifugalaction from within the tube 9B to the outside of said tube within thesolid bowl 69. A conical series of inclined nights or agitators 98 isattached to the tube 96 and operate close to the inner surface of thesolid bowl 89 to assist movement of thesolids downwardly and the liquidsupwardly for dis charge fromsaid bowl, substantially in the manner of mysaid Patent No. 2,218,532.

An annular space 99 is formed between the lower'portion of the wall ofthe solid bowl 69 and the periphery of the bottom wall 95. The wall 95is below the openings 91 and, fora short time, supports the solids andliquids until they are thrown outwardly by centrifugal action, assistedby the 'langes lll above the wall 95 and at the lower end of the tube96. The agitator nights 98 extend downwardly through the annular space99 and terminate near the lower end'of the continuously rotating solidbowl 89.

Valve means comprisinga plate IDI is provided for intermittently openingand closing the lower to the plate mi.

end of the bowl B9 to effect intermittent discharge of the solids fromsaid bowl through the passages l2. A hub m2 formed integral with theplate IBI is mounted on the upper end of the shaft 86 for longitudinalsliding and relative turning movements. The hub |02 cooperates with theenclosed portion of the shaft 88 to forni an oil chamber its renderedleak-proof at its upper and'lower ends by elastic gaskets or packingdevices |04, preferably retained from longitudinal displacement andleaving the shaft 84 free to rotate while the plate Ii remainsstationary, and permitting longitudinal sliding movements of said platealong the shaft 8.

L'l'lie plate mi is located between the support 'il and the lower end ofthe solid bowl 69, and is of greater diameter than the opening from thelower end of .said bowl. An annular valve seat it is attached to thelower end of the bowl 69 for engagement by a sealing ring Bilt attachedThe plate lili may be moved longitudinally along the shaft 8d to engagethe sealing ring it with the valve seat l d5 and thereby close the lowerend of the solid bowl to prevent discharge of solids therefrom throughthe passages 32.

in the arrangement shown in Figs. 7 and 8, an annular series ofcentrifugal actuator weights is? are mounted on pivots it carried by thesupport il. The weights l0? are inwardly beyond the passages l2 and havearms |09 engaging against the underside of a bearing ring lid inconnection with the underside oi the plate iti. Because of the fact thatthe support il is continuously rotated when the motor dil is running andthe machine operating, the weights itil are impelled outwardly bycentrifugal force, as re' quired to support the plate IG! in a positionin which the seal IUS engages the valve seat ld Aand thereby completelycloses the lower end of to the lower extended end of the saft 84 withinthesupport Hl. The 'shaft sa is tubular and its lower end opens into thecylinder H2, and the upper end of said shaft has passages I I3 openingcommunication from the chamber |03 to a series of cylinders ||5 attachedto the support 1|. Pistons ||5 in the cylinders ||5 have stems ||1engaging arms ||0 extending inwardly from the up r ends of thecentrifugal actuator weights i 'Ihe cylinder ||2, shaft 34, passages||3, tubes ||4, and cylinders contain oil or other hydraulic liquidwhereby the lpistons I I5 may be moved and forced in a direction to.move the centrifugal actuator weights |01 inwardly, leaving the valveplate |0| free for downward movement from the valve seat |05 to permitdischarge of solids from the lower end of the bowl 53 through thepassages 12. Each cylinder ||5 may enclose a spring ||9 to assist inquickly moving the piston i I5 to actuate or disable the centrifugalweight |01 controlled by said piston. By this arrangement the valveplate |0 is caused to rotate with the solid bowl 09 instead of with theshaft 34, the ends 'of the chamber |03 being kept leak-proof by thesealinggaskets |04.

A piston |20 is mounted inthe. lower end of the cylinder ||2, and has arod |2| projecting downwardy through a packing |22 at the lower end ofthe support i||. The lower end 'of the cylinder ||2 is rotativelymounted in a bearing |23 in the support iii. The lower end of the pistonrod |2| has pin and slot connection |24 with a lever |25 mounted on afulcrum |25 whereby the piston |20 may be moved upwardly to force theoil or other liquid against the lower ends of the pistons ||6 to causesaid pistons to disable the centrifugal actuators |01 and move theminwardly against the impulse of centrifugal force to permit the valve 0|to be opened by the pressure of the solids within the bowl 59. Wh'enthe4lever |25 is released, the centrifugal weights |01 will swing outwardly,forcing the liquid from the cylinders ||5 through the tubes ||4, chamber|03, and shaft 34,-into the cylinder liz to move the piston |20downwardly.

The solids passing from the openings 12 are discharged onto arotaryconical floori21 analogous to the rotary conical iloor 5| andsupported on rollers |23 carried by the frame 32 and centered by rollers|29, also carried by said frame. An annular rack |30 attached to theconical floor |21 meshes with a pinion |3| secured to the upper end of arotary shaft |32. A gear |33 the lever |4|, to pass the roller |43beyond and out of engagement with the lever 25. When the roller |43passes out of engagement with the lever |25, the pressure of thematerials withinthe bowl 09 opens the valve |3| and permits flow of thesolids from said bowl until the valve is again closed. The lever |25 isoperated by the lever i4| once during each revolution of the shaft |42,and speed of rotation of the latter may be regu-v lated and timed asdesired in order to effect operation of the valve |0| at the desiredtime intervals.

'I'he oil circulated by the pump |40 to lubricate the bearings 15 and 15is returned to the housing 93'through a pipe |45. Fromthe housing 93 theoil may pass into the support through a passage |43 to lubricate thebearing |23.

The construction and arrangement of the parts of the machine shown inFig. 9 are the same asI the construction and arrangement of the partsshown in Figs. 'I and 8, with the exception of the means for operatingthe centrifugal actuators. In Fig. 9, the centrifugal actuatorssupported on the pivots |5| have arms |52 engaging the bearing ring ||0in the manner that the arms |09 engage said bearing ring. 'I'hecylinders |53 enclose pistons |54 having rods |55 engaging levers |59.The levers |55 are supported on pivots |51 and have projections |53engaging in :frames |59 attached to the centrifugal actuators |50. Whenthe pistons |54 are forced outwardly by the liquid entering thecylinders'i53, the levers |55 are operated .to move the l centrifugalactuators |50 to ineffective positions against centrifugal impulse,leaving the valve |0| free to open. In other particulars, the mechanismshown in. Fig. 9 is the same as that already described, and the samereference numerals are applied to like parte.

\ During operation of the machine, the solids discharged through theopenings 12 onto the impeller cone |21 pass to a supporting door |53along which the solids are moved or swept and agitated by sweeper andstirrer arms |5|. The solids are moved to a discharge outlet (notshown), and the agitation andv movement thereof is attached to the lowerend of the shaft |32 and meshes with' a pinion |34 secured to a shaft|35 supported within the Vhousing 93.4 A worm gear |35 attached to theshaft |35 meshes with a worm |31 on a shaft |33 rotatively supportedwithin the housing 93; The shaft |35 is constantly rol tated when themotor 33 is running by a pulley |39 attached to said shaft and engagedby the belts 15. An oil pump 43 is operated by the shaft |33 within thehousing 33 to circulate oil Zinn'i the manner explained in thedescription of The lever .|25 may bemanually operated, or`

mechanically operated` at or after equal time intervals, as desired. Asshown generally at the lower portion of Fis. '1. a lever |4| attached toa. rotary shaft |42 may be equipped with a' roller device. |43 to engageand operate the lever |25 to raise the piston. |23. A gear |44 attachedto the shaft |42 meshes with'a-pinion |45 secured t0 a rotary shaft |45.The shaft `l|45 may be driven by a motor |41 in order to rotate thelever |4| to engage the roher |43 intermittently with the lever |25 andoperate the same to raise the piston |23; and-during continued movementof by the arms |3| effectively prevent cohesion and increase the dryingeffect of the machine.

The machine shown' in Fig. 10,/like the machines shown in Figs. 7 and 8,is generally designated a solid bowl machine because the bowl 39 isimperfora and does not function as a sieve or strainer to permit passageof liquid therethrough, but requires the liquids to pass from the 'bowlthrough the upper end thereof, as disclosed in my said Patent No.2,218,532, dated October 22, 1940. The same reference numerals areapplied to like parts in Figs. "I, 8 and l0. The

machine shown in Fig. 10 comprises two valve devices for alternately andintermittently controlling discharge of solids from the bowl 53 insteadof the single valve means |3| contained in the machine of Figs. 7 and 8.

As shown in Fig. l0. the agitator flights 33' terminate considerablyabove the valve seat |35.

and are of less Vlength than their analogs 33, to provide space for anannular valveseat |32 at'- tached to the inner surface of the bowl 39just below the ends of the agitator flights Valve means comprising aplate |53 is formed rigid or integral with the hub |32' analogous to thehub |02 previously described and arranged in the same relationship tolike` elements contained in the precedingform of the invention andhaving' asvosa guiding member |85 concentric with the hub |82' l andwith the shaft Il. A valve plate |88 is formed with aninteZralchub |81mounted for sliding movements on ythe guide member |88 below the valve|83. A sealing ring |88 is attached to the upper surface ot the valveplate |88 for engagement with the valve-seat |88.

An annular series of rocker levers |88 are mounted for s movements onsupports |10 attached to the plate A|'|| constituting a part of therigid support 1| secured to the bowl 88. The tubes ||4 that formcommunication from the chamber |03 to the series of cylinders |-|8,'attached in this instance to the fplate pass through openings' in thevalve plate |83 so as to function in the manner before described tooperate the centrifugal devices il'l by which the valve Plate |68 ismoved to its closed position.

In operation, the shaftsjl and I4 are continuously rotated at dierentialspeeds by the mechanismshown in Fler?, and the valve |18 is allier-`nately opened and "closed by operation of the centrifugal actuators |81.When the valve lis closed. the valve |83 4is opened and held open -bythe contents of the lbowl 88 side thereof. which pressure is increasmilby centrifugal force. -This permitsthe solidsto poss the valve |83 intothe space ly above the valve |88. When fluid pressure is admitted intothe cylinders llt. thecentrii'ugei actuators |01' are moved to positionsto permit the valve |88 to be opened Fb! the prolsllreioif the' solidmaterials thereon, which is byo'entrits ugal iorce. When valve i ismanner operates the rocker'l levers Into raise the valve Itoitsclosedpositiomandthiealtsr nate operation of these vaivesisrepeatedto dis charge measured quantities ot solids from lbowl Il undercontrol otthe alternately and termittently operated vains- III an .thisthe solids can pass out the |2.

solids; a substantially asainstthe upperintsandanddistilleryslopsandthelikmabout coal; an about 45 for 'drying'The angle oi inclination of the screenbasketmaybevaxiedfordiiierentpurposesand uses to attain best results asdetermined by experience. I'he term angle of inclination refers to theinclination with respect to the horizontal f plane. l

The machine may be varied in various other particulars than thosespecifically described and shown in the drawings without departure fromthe nature and principle ofthe invention. I contemplate such variationswithin the scope of eqlivcaegt limits as may be dired.

1.oIn 'a'centrifugal machine having a polifo-rr rated outer conicalelement provided with a screen and a solid inner conical element formingbetween them a space for receiving mixed solids and liquids and' havingan inlet for supplying said mixed solids an`d liquids into said spaceand also having a downwardly directed opening for discharging saidsolids from said space, outer and inner coaxial shafts for rotating saidouter and inner elements, respectively, and a housing wall `around saidouter conical element forming a space for receiving liquids separatedfrom said annular .trunoo-conical floor concentric, with said shaftslocated below said. space for receiving said discharged therefromthrough said downwardly ldirected opening, connections covered andprotected by said door for rotating said outer shaft, searing forrotating said inner shaft by said outs; shaft,- and gearing whollycovered and protected bysaid floor forrotating said iioor by saidconnections.

2. In a' centrifugal machine having an outer conical element and aninner element coaxial and cooperating with said outer element to formbetween them a Ispace for receiving mixed solids and liquids and havingan inlet for supplying said mixed solids and liquidsinto said space andalsov having a downwardly directed opening -to dischargesaidsolidsnomsaidspace,ahousingwsll sam gearingiand' connectionsdriven bysaidmotorforrotanssaidshai'ts. V

siuimi'wr'.frown` A around said outer conical elementfoiming a

